Oil Well Testing Handbook
Providing real-life examples and cases, this resource contains the basics of well testing methods as well as all of the latest developments in the field, including testing for horizontal wells.
TABLE OF CONTENTS Oil Well Testing Handbook
5.11: Rate Normalization Techniques and Procedures (Pressure Buildup Data)
5.11 Rate Normalization Techniques and Procedures (Pressure Buildup Data)
Methods to analyze afterflow-dominated pressure buildup data are presented. Total afterflow fluid rate should be used in multiphase flow analysis.
| Pressure buildup test data | Computed data | |||
|---|---|---|---|---|
| Test point No. | Shut-in time, ?t (hr) | Shut-in pressure, p ws (psi) | Computed dimensionless summation function X | ?p = (p ws ? 1253) (psi) |
| 1 | 0.25 | 1391 | 5.92 | 138.2 |
| 2 | 0.50 | 1401 | 5.62 | 148.0 |
| 3 | 1.00 | 1405 | 5.32 | 162.0 |
| 4 | 2.00 | 1434 | 5.01 | 181.0 |
| 5 | 3.00 | 1446 | 4.84 | 193.0 |
| 6 | 4.00 | 1455 | 4.71 | 202.0 |
| 7 | 5.00 | 1467 | 4.61 | 214.0 |
| 8 | 6.00 | 1483 | 4.54 | 230.0 |
| 9 | 12.00 | 1510 | 4.23 | 252.0 |
| 10 | 18.00 | 1522 | 4.05 | 269.0 |
| 11 | 24.00 | 1538 | 3.92 | 278.0 |
| 12 | 30.00 | 1536 | 3.82 | 283.0 |
| 13 | 36.00 | 1538 | 3.74 | 285.0 |
| 14 | 42.00 | 1541 | 3.67 | 288.0 |
| 15 | 48.00 | 1543 | 3.61 | 290.0 |
| Point | Slope m | Total mobility | p * | | pl | FE | Skin factor, | |
|---|---|---|---|---|---|---|---|---|
| used | (psi/cycle) | (mD/cP) | (psi) | (psi) | Actual | Ideal | (%) | s |
| 1-4 | 47.50 | 32.41 | 1669 | 1480 | 4.702 | 3.74 | 126 | ?1.41 |
| 2-5 | 57.90 | 26.59 | 1724 | 1490 | 4.350 | 3.09 | 142 | ?2.03 |
| 3-6 | 60.05 | 23.31 | 1765 | 1512 | 4.130 | 2.69 | 154 | ?2.41 |
| 4-7 | 80.14 | 19.21 | 1834 | 1533 | 3.810 | 2.23 | 192 | ?2.30 |
| 5-8 | 119.43 | 12.88 | 2021 | 1573 | 3.140 | 1.49 | 211 | ?3.65 |
| 6-9 | 112.90 | 13.64 | 1989 | 1580 | 3.250 | 1.57 | 207 | ?3.57 |
| 7-10 | 94.05 | 26.37 | 1925 | 1558 | 3.500 | 1.89 | 185 | ?3.19 |
| 8-11 | 78.59 | 19.59 |
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